Add description about GSSOpenServer wait event into document.

MasaoFujii · MasaoFujii · commit 0b5474181569 · 2020-02-17T16:19:36.000+09:00
This commit also updates wait event enum into alphabetical order. Previously the enum entry for GSSOpenServer was added out-of-order. Back-patch to v12 where commit b0b39f7 introduced GSSOpenServer wait event. In v12, the commit doesn't include the update of wait event enum, not to break ABI. Author: Fujii Masao Reviewed-by: Michael Paquier Discussion: https://postgr.es/m/949931aa-4ed4-d867-a7b5-de9c02b2292b@oss.nttdata.com
diff --git a/doc/src/sgml/monitoring.sgml b/doc/src/sgml/monitoring.sgml
@@ -1272,14 +1272,18 @@ postgres   27093  0.0  0.0  30096  2752 ?        Ss   11:34   0:00 postgres: ser
          <entry>Waiting in main loop of WAL writer process.</entry>
         </row>
         <row>
-         <entry morerows="7"><literal>Client</literal></entry>
+         <entry morerows="8"><literal>Client</literal></entry>
          <entry><literal>ClientRead</literal></entry>
          <entry>Waiting to read data from the client.</entry>
         </row>
         <row>
          <entry><literal>ClientWrite</literal></entry>
          <entry>Waiting to write data to the client.</entry>
         </row>
+        <row>
+         <entry><literal>GSSOpenServer</literal></entry>
+         <entry>Waiting to read data from the client while establishing the GSSAPI session.</entry>
+        </row>
         <row>
          <entry><literal>LibPQWalReceiverConnect</literal></entry>
          <entry>Waiting in WAL receiver to establish connection to remote server.</entry>
diff --git a/src/backend/postmaster/pgstat.c b/src/backend/postmaster/pgstat.c
@@ -3704,6 +3704,9 @@ pgstat_get_wait_client(WaitEventClient w)
 		case WAIT_EVENT_CLIENT_WRITE:
 			event_name = "ClientWrite";
 			break;
+		case WAIT_EVENT_GSS_OPEN_SERVER:
+			event_name = "GSSOpenServer";
+			break;
 		case WAIT_EVENT_LIBPQWALRECEIVER_CONNECT:
 			event_name = "LibPQWalReceiverConnect";
 			break;
@@ -3722,9 +3725,6 @@ pgstat_get_wait_client(WaitEventClient w)
 		case WAIT_EVENT_WAL_SENDER_WRITE_DATA:
 			event_name = "WalSenderWriteData";
 			break;
-		case WAIT_EVENT_GSS_OPEN_SERVER:
-			event_name = "GSSOpenServer";
-			break;
 			/* no default case, so that compiler will warn */
 	}
 
